Protecting-thimble for fume-bags.



C. F. DOUGHEEHY.l PROTECTiNG THIMBLE FOR FUME BAGS. APPLICATION FlLED JAN. 21. 1916.

1,178,385. l Patented Apr. 4, 1916.

Y LQ/ l /4 intensa.

CORNELIUS nnoUeHEnTY, or iannivnrr, CALIFORNIA.

PROTECTING-THMBLE FOl't lUME-BAGS.

To all-whom t may concern.'

Beit known that l, CORNELIUS F. Dooom nn'rY, a citizen of the United States,.residing at Kennett, in the county of Shasta and State of California, have inventedcertain new and useful improvements in Protecting-Thimbles for Fume-Bags; and 1 do der clare the following to be, a full, clear, and

exact description of the invention, such'as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in devices used for conducting the gases and Ifumes given ofi from metallurgical furnaces, and has for its principal object to provide an article which will greatly lengthen the life of the fume bags used in this art.

In smelting operations the fumes are conveyed from the furnaces to bags which are suspended in the bag-house for separating the solidl particles contained in the fumes `from the gas which escapes through the mesh of thebags; These solid particles adhere to the interior of the bags which are periodi cally shaken to remove the dust whichalls into suitable receptacles below the same. These bags aremade of wool and the chemi calaction of the fumes causes them after a time torot. The part vwhich vfirst begins to decay is the very top end oi the bag which is closed and supported by a ring in the top oi the bag-house. My invention is designed to overcome this rapid decomposition of the bags at their upper ends by providing' a metallic ring or thimble upon which .the end of the bag is tied.V

In the accompanying drawings which`- l illustrate my invention, Figure 1 is a side elevation ofthe upper end of a fumey bag showing the application of `my invention thereto; Fig. 2 is a detail transverse section through the protector and a portion of a bag thereon; Fig.; 3 is an enlarged detail l transverse section `showing the methodof securing the hook in the upper end of the protector.

Inasmuch as the. construction of a baghouse is well known to those skilled in the art, have illustrated merely the upper end of oneof the bags so as to show my invention. It is obvious that one of my improved pretflctors is applied to each of the bags of the-hag-house. 'As will be seen in the draW- ings, my invention `comprises a thimble l substantially the diameter of the bag B.

l Specification of Letters Patent.

Patented Apr. d, 1916.

`Application led January 27', 1916. Serial vNo. 74,683.

which surrounds the same, said bag being tied by the wires or other fastening means C.` In order to more readily retain the bags upon the thimbles, l providel the same with the annular grooves 2 as shown, 1n which the wires (l are disposed. f7.1.

rEhe upper edge of the thimble l is bent laterally loutward as shown at 3 and then downwardly as shown at '4. rlhe top or cover for `the thimble isa circular plate 5 which inclines upward slightly from its outer edge to its center and has itsperiphery bent downwardly as shewA at 6, then 'inwardly as at 7, and then upwardly as at 8 to provide interlocking means for engagement with the similar means on the upper edge of the thimble. W'hen the two parts have been engaged as shown in the drawing and soldered in this position, a gas tight joint of very strong construction is formed.

T he apex of the top which is formed from the circular plate 5 is iiattened as shown at 9 and provided with a central aperture 1() into which the shank 11 of a hook 12 is disposed. The shank of this' hook is threaded' and receives a spacing nut 13. Before Vplacing the shank 1l into the aperture 1() a 1 metallic washer 14 and a. disk 15 are placed thereon, thus disposing the same on the top ofthe plate 5. After the shank has been inserted through the aperture an asbestos washer 16 is placed thereon and closely surrounds the aperture 10 and engages the inner face of the flattened portion 9. Over this asbestos washer is placed a disk 18 similar in construction to the disk 15, a metallic washer 19 being then'placed on the shank and engagedwith said disk 18. Finally, a

clamping nut 2Q is threaded on thev inner end of theshank and `tightly clamps the; metallic washers, the disks, and the asbestos washer together, and to the flattened por tion 9 or' the plate so that all gas is pre-a vented from 'escaping through the aperture 10.v Both the disk 15 and the vdisk 18 have their edges turned so as to closely engage the inclined wall of the plate 5, as shown.

When the parts of this device have been assembled and the bag secured thereon, the hook is engaged with a ring R depe ding from the roof of a bag-house (not s own). ln order to retain the hook in engagement with the ring when the bag is being shaken.

a wire lV is disposed, as shown in the drawings, about the bill 21 of the hook in the I' curved portion thereof below the ring. ln"

like and sold very cheaply.

I claim:- l. A devioe of the class described comprisinga thimble to be inserted in the mouth of a fume bag, said thimble having an annular groove therein to aid in securing said center, said outer edge being secured to the Aupper edge of said thin1ble,'the apex of' said plate being slightly flattened andprovided with a central aperture, a hook having a threadedishank extended through said. aperture, a spacing nut on said shank adjacent the hooked end, a. washer interposed between said nut and the liattened portion of the plate, an asbestos washer on said shank on the inner side of said flattened portion, a disk disposed over said asbestos washer, a metallic washer engaged with said disk, and a clamping nut threaded on said shank whereby to clamp said washers and disks into engagement with said flattened portion to provide a gas tight closure.

2. A device of' the class described com prising a thimble to be inserted in the mouth .of a fume bag,'said thimble having an anto provide an interlocking means lfor engageme'nt with thebent upper edge oit' said thimble, the apex of' said plate being slightly flattened and provided with'a central aperture, a hook having a. threaded shank tended through said aperture, the bill of said -hook having a notch to receive arretaining wire, a spacing nut'on said shank t adjacent the hooked end, a disk interposed between said nut and the fiattened portion of the plate, said disk having its edge bent into engagement with the 4inclined portion of' saidplate, a washer between the disk and the nut, a packing washer on said shank on the inner side of said flattened portion, an additional disk disposed overfsaid packing washer and having its edge bent into engagement with said plate, a clamping nut threaded on said shank, and a clamping Washer interposed between,l said clamping nut and the additional disk, whereby a gas tight closure is formed.v v. i j

In testimony whereof l have hereuntoset my hand in presence of two subscribing witnesses. i l

CORNELIUS F. DOUGHERTY. WYitnesses JOHN F. Rainy, MICHELE LEONRDIRIS. 

